Fritz scewarzer



F. SCHWARZER.

SIGNAL WHISTLE.

APPLICATION FILED [13.31.1918.

Patented Nov. 18, 1919.

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UNITED sTaTEs PATENT oEErcE.

FRITZ SCHWARZER, OF ST. GALLEN, SWITZERLAND.

S1@NAL-WHISTLE.`

Application filed December 31, 1918.

To all 'whom t may Concern Be 1t known that I, FRITZ SGHWARZER, acitizen of the Swiss Confederation, and residing at St. Gallen,Switzerland, have in vented certain new and useful Improvements inSigiial-Vlhistles, of which the following is a specification.

The present invention has reference to certain new and usefulimprovements in alarm or signal whistles, and relates more particularlyto whistles actuated by a suitable power fluid, as for instance a jet ofsteam or the explosion or exhaust gases of a motor, and the inventionhas for its specilic object to provide means whereby the sounding memberto be impinged uponby the pressure medium can be swung around on thevalve casing proper, as can also the head part of the device whichcomprises the valve actuating` mechanism, for the purpose to allow ofmounting such an alarm device even in places where a one-piece orrigidly assembled alarm device could be set up only under greatditculties or not at all, so that the sounding member and the valveoperating mechanism can be directed, independently of one another, toany point of the compass without the supporting valve casing beinglikewise rotated.

My invention will best be understood when described in connection withthe accompanying drawings, in which Figure 1 is a side elevation of thealarm whistle, partly in section; Fig. 2 is a plan view, and Fig. 3 ahorizontal section therethrough on line A-B of Fig. 1.

The device essentially comprises the valve casing with axially operablevalve stem, the rotatable valve jacket with the sounding member rigidlysecured thereto, and the rotatable valve operating mechanism.

The valve casing consists of the centrally bored shell or stem 1, whoselower extremity is provided with an external thread 2 and whose upperend is preferably in the shape of a hexagon head 3 with an integralannular neck portion 8. About its middle the wall of this shell ispierced by radially disposed ports 4. As shown in Fig. 3 there areprovided four such ports, but it is to be understood that also a lessernumber may be arranged. The lower mouth of the shell forms the seat 5for the valve disk 6 of the long valve stem 7 extending clear throughthe valve casing to beyond the annulus 8. Between the valve stem 7 andthe Specification of Letters Patent.

Patented Nov. 18, 1919.

Serial No. 269,110.

wall of the casing 1 there is provided in the lower portion of thelatter an annular chamber 9. The valve jacket 10 above and below snuglysurrounds the valve casing 1 and provides between it and the latter anannular chamber 11. At one side there extends laterally from thisrotatable jacket 1() a cup-shaped member 12, and the jacket wall withinthis cup presents a thickened center boss 13 and a plurality of ports14. Into the boss 13 is screwed the one end of a stud 15, to the otherend of which is suitably secured the closed end of the sounding member16 with the aid of the counter nuts 17. Within the cup member 12 ispositioned on the stud 15 a disk 1S of such dimensions that between itand the dish wall a line circular slot or port 19 is presented, and thethin facing edge 2O of the contracted throat of the sounding member isdesigned to properly register therewith, as well known in the art.

Upon the hexagon head 3 and annulus 8 is rotatably positioned the valveactuating mechanism, comprising an essentially U- shaped chair 21, inthe one leg 21 of which is fulcrumed the one end of a pull-lever 22 tothe free end of which is attached a pull member 24, which is preferablya so-called Bowden'cable, that is a wire core about which a wirespiralis closely wound. The wire core 25 passes freely through the small bore26 in the leg 21l of the chair 21 and the spiral mantle 27 isaccommodated in the larger bore 28 thereof. A spring ring 29 preventsthe lever chair 21 from becoming inadvertently detached. Between thevalve jacket and the hexagon there is provided a packing 30.

The upper extremity of the valve stem is rounded-off and is positionedunderneath the pull-lever 22, and it rests on the washer 31, betweenwhich latter and the chair 21 a helical compression spring 32 isinterposed.

In mounting such an alarm whistle, its threaded lower end 2 is screwedhome into the pressure carrying pipe, the whistle member proper and itsactuating mechanism not being rotated the while, which is often veryconvenient when working in cramped quarters, where the laterallyextending sounding cup could not be swung around in a circle. As soon asthe parts are screwed together far enough so that the .pressure pipecontacts with the lower edge of the valve jacket l0, the latter with itssounding member is swung into the desired horizontal position and theparts are then tightened-up detinitely. Finally the valve stem operatingmechanism is relatively rotated until the cable is in the desiredposition free from interference with the sounding member and otherobstructions.

For blowing the whistle, the cable is pulled and the lever 22consequently depressed to operate the wvalve stem, which lifts the valvehead olf its seat, when the pressure medium, :tor instance the exhaustfrom an engine cylinder, can pass into the chamber 9, from there throughthe ports Ll into the chamber l1, then through the ports 14tand theannular port 19 to impinge on the facing edge 2O or' the sounding member16. On release of the cable, the valve will be closed by the action ofthe expanding spring 32.

l/Vhat I claim is 1. In an alarm device of the character described, incombination, a valve Casing, a chamber jacket, a sounding` member' onsaid jacket, a valve in said casing, and means for operating said valve;said jacket and said valve operating means being mounted on said casingwith capability of independent relative rotation, for the purpose ofarranging` the jacket with its sounding member and the valve operatingmeans, independently of one another, in the most favorable operativeposition, no matter what the relative position ot' the supporting valvecasing,

2. In an alarm device or' the character described, in combination, avalve casing, a chambered jacket mounted on said casing with capabilityof temporary relative rotation, a sounding member extending laterallyfrom said jacket, a valve operable within said valve casing, and meansfor operating said valve.

3. In an alarm device of the character described, in combination, avalve casing, a chambered jacket mounted on said casing with capabilityof relative rotation, a sounding member extending laterally from saidjacket in rigid connection therewith, a valve operable within saidcasing and controlling the flow oi' pressure medium through said casingand said jacket and onto said sounding member, and means for operatingsaid valve, mounted on said casing with capability of relative rotation,independently of that of said jacket.

4. In an alarm device of the character described, in combination, avalve casing having lateral ports, means for operatively connecting saidvalve casing to a pressure conduit, a stemmed valve loperable in saidcasing, the walls of said lcasing and the stem of said valve presentingbetween them an annular chamber closed above and adapted to be placed incommunication with the pressure conduit upon actuation of said valve,means for operating said valve, a jacket surrounding part of said valvecasing in such manner that an annular, top-andbottom-closed chamber isformed therebetween, a cup-shaped member extending laterally from saidjacket in communication with the second said annular chamber, aconcentric baffle member in said cup member of such dimensions that anannular port is formed between it and the cup member, a sounding memberwhose free edge is in operative register with said annular port, thesaid valve jacket being mounted on said valve casing with capability ofrelative rotation and designed to be clamped in the relative endposition by the valve casing being connected to the pressure conduit.

5. In an alarm device of the character set forth, in combination, avalve casing, a sounding member mounted on said casing with capabilityor' relative rotary displacement and in operative communicationtherewith, means for locking said sounding member in its adjustedrelative position, a spring actuated valve operable in said casing, andmeans for operating said valve, comprising a substantially U-shaped seatmember mounted on said valve casingwit-h capability of relativerotation, lever means pivotally secured to one leg of said U-member andadapted to actuate said valve, and a Bowden cable attached to the freeend of said valve actuating lever and its core passing freely throughthe other U-member leg and its envelop abutting thereagainst.

. FRITZ scHWARZER.

